TS ISO 15519-1

TS ISO 15519-1 is the first part of the specification for diagrams used in the process industry, focusing on the general rules for how information is arranged and presented. In process plants, piping, equipment, instrumentation and operating information often appear within the same diagram family, so a common framework is essential for keeping these documents readable, consistent and interpretable in a uniform way across disciplines.

Why a common language matters in process diagrams

In general technical practice, diagrams are more than illustrations: they function as a shared technical language between design, operation, maintenance, safety review and documentation teams. In this context, such diagrams help make equipment layout, flow direction, connections and core functions understandable at a glance. The general rules covered by this part support consistent preparation of the symbols and information used in those diagrams.

What the scope of this part means

• General principles for preparing and presenting information in diagrams for the process industry
• Guidance aimed at making diagrams more consistent and easier to interpret for different users
• A common approach to drawing conventions, notation and information presentation

From a general technical perspective, the value of a standard like this lies less in describing a specific plant and more in helping diagrams be prepared with the same logic across projects and disciplines. That improves alignment between process flow, symbols and explanatory information, and it makes communication between project teams and operating personnel more effective. TS ISO 15519-1 establishes this basic structure for process-industry diagrams and sets out the general rules for the series.